how to use photo image in tkinter code example

Example 1: python tkinter image

import tkinter as tk
from PIL import Image, ImageTk

root = tk.Tk()
img = Image.open("path\\to\\imgage.jpg")
img = img.resize((250, 250))
tkimage = ImageTk.PhotoImage(img)
tk.Label(root, image=tkimage).grid()

Example 2: image tkinter

from tkinter import *      
root = Tk()      
canvas = Canvas(root, width = 300, height = 300)      
canvas.pack()      
img = PhotoImage(file="ball.ppm")      
canvas.create_image(20,20, anchor=NW, image=img)      
mainloop()